'use strict';
var number_map_to_word_over_26 = function(collection){
  
    let result=collection.map(function(num){
        if(num<=26)
            return String.fromCharCode(96+num);
        else if(num%26==0)
            return String.fromCharCode(96+(num-1)/26)+String.fromCharCode(122);
        else
            return String.fromCharCode(96+num/26)+String.fromCharCode(96+num%26);
    })
    return result;
    
};

module.exports = number_map_to_word_over_26;
